AnswersHVA 26-27 IM Biology ALab: Diffusion Across a Semi-permeable Membrane

Mitosis Answers

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1
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Which statement best describes cancer cells?

A
They grow as a single layer of cells.
B
They cease to reproduce after 20–50 mitotic divisions.
C
They reproduce only when needed to replace missing cells.
D
They are not regulated by contact inhibition.
2
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During which phase of mitosis do the nuclear membrane, nucleolus, and nucleus dissolve?

A
metaphase
B
prophase
C
anaphase
D
telophase
3

In which phase of mitosis are chromosomes first seen as a result of chromatin coiling?

A
prophase
B
anaphase
C
metaphase
D
telophase
4

Centromeres split apart during

A
prophase
B
metaphase
C
anaphase
D
telophase
5

Early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. In which stage of the cell cycle is this process reversed?

A
cytokinesis
B
interphase
C
anaphase
D
telophase
6

After chromosomes are formed, during which phase of mitosis do the chromosomes attach to the spindle fibers by their centromeres?

A
anaphase
B
prophase
C
metaphase
D
telophase
7

In which of these stages is mitosis most important?

A
A tiger cub is born.
B
A tiger cub learns to walk.
C
A tiger cub begins to grow.
D
A tiger cub play-fights.
8

Which statement accurately describes the relationship between cytokinesis and mitosis?

A
Mitosis includes interphase and cytokinesis.
B
Cytokinesis precedes mitosis in the cell cycle.
C
Cytokinesis is not a phase of mitosis, but occurs during mitosis.
D
Interphase includes cytokinesis and mitosis.
9

Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure?

A
Scientists can observe how cultured cells respond to a medicine before testing it in patients.
B
Cultured cells always respond to a medicine exactly as cells in a patient’s body would.
C
Doctors can determine how to treat every type of cancer from one tissue culture.
D
One tissue culture can show how a medicine will work for every cancer patient.
10

An example of mitosis at work is a leaf

A
turning yellow.
B
growing.
C
taking in carbon dioxide.
D
performing photosynthesis.

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